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Finding the Fourth Proportional to 57,686.70, 86,578.65 and 26,145.30

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Solution

The fourth proportional to 57,686.70, 86,578.65 and 26,145.30 is: 39,239.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,686.70 : 86,578.65 = 26,145.30 : x
  2. Step 2: Convert to fraction form
    57,686.70/86,578.65 = 26,145.30/x
  3. Step 3: Cross multiply
    57,686.70x = 86,578.65 × 26,145.30
  4. Step 4: Simplify right side
    57,686.70x = 2,263,624,777.85
  5. Step 5: Solve for x
    x = 2,263,624,777.85/57,686.70
  6. Step 6: Final answer
    x = 39,239.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.